Journal
IEEE SENSORS JOURNAL
Volume 18, Issue 7, Pages 2801-2806Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2018.2802440
Keywords
Microfiber sensor; alcohol sensor; methanol sensor; polymer microfiber sensor; polyaniline
Funding
- Universiti Teknologi MARA Internal Research Grant ARAS [600-RMI/DANA 5/3/ARAS]
- LESTARI [600-RMI/DANA 5/3/ LESTARI]
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The main objective of this paper is to investigate the effect of Polyaniline (PANI) as a dopant in the fabrication of a polymer microfiber for sensing methanol. A simple direct drawing technique was employed in the preparation of a Poly (methyl methacrylate) (PMMA) doped with PANI microfiber. The changes of the power spectrum were measured through an optical spectrum analyzer over a range of 100-500 ppm methanol solution concentrations. It was observed that the sensor utilizing a PANI-doped microfiber had a higher response toward the changes in the methanol solution concentrations compared with its undoped counterpart with an improvement of 41.01% and more than 5 times for the sensitivity and resolution, respectively. A sensitivity of 0.047 dBm/ppm was attained with the use of a PMMA microfiber with a taper diameter and length of 3 mu m and 3 mm, respectively. The field emission scanning electron microscopy proved the successful doping of PANI into the PMMA microfiber, which contributed to the increase in the performance of the sensor.
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